saving performed on separate thread so that save-in-progress UI would work

src/net/torvald/terrarum/console/Echo.kt

@@ -17,12 +17,14 @@ internal object Echo : ConsoleCommand {
         for (ch in single_line) {
             if (ch == '\n') {
                 (Terrarum.ingame!!.consoleHandler as ConsoleWindow).sendMessage(sb.toString())
+                println(sb.toString())
                 sb.delete(0, sb.length - 1)
             }
             else
                 sb.append(ch)
         }
         (Terrarum.ingame!!.consoleHandler as ConsoleWindow).sendMessage(sb.toString())
+        println(sb.toString())
     }
 
     operator fun invoke(args: Array<String>) = execute(args)